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Flight crew of B757 encountered wing to wing fuel imbalance when 1 of 2 fuel xfeed switches was left improperly in the open position.
| Attributes | |
| ACN | 592434 |
| Time | |
| Date | 200309 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : iiu.vortac |
| State Reference | KY |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc tower : myf.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 592434 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : company policies |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
It was discovered that a single fuel xfeed switch was in the valve-open position. It is not known when this happened or even whether the crew inadvertently pressed the switch or whether it was missed on preflight. A fuel imbalance wing-to-wing had developed, which was considerably out of limits. Crew descended to lower altitude to increase total burn, and xfed to return fuel balance to within limits prior to landing, touching down with 500 pounds difference between tanks.
Original NASA ASRS Text
Title: FLT CREW OF B757 ENCOUNTERED WING TO WING FUEL IMBALANCE WHEN 1 OF 2 FUEL XFEED SWITCHES WAS LEFT IMPROPERLY IN THE OPEN POS.
Narrative: IT WAS DISCOVERED THAT A SINGLE FUEL XFEED SWITCH WAS IN THE VALVE-OPEN POS. IT IS NOT KNOWN WHEN THIS HAPPENED OR EVEN WHETHER THE CREW INADVERTENTLY PRESSED THE SWITCH OR WHETHER IT WAS MISSED ON PREFLT. A FUEL IMBALANCE WING-TO-WING HAD DEVELOPED, WHICH WAS CONSIDERABLY OUT OF LIMITS. CREW DSNDED TO LOWER ALT TO INCREASE TOTAL BURN, AND XFED TO RETURN FUEL BAL TO WITHIN LIMITS PRIOR TO LNDG, TOUCHING DOWN WITH 500 LBS DIFFERENCE BTWN TANKS.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.